Experimental pre-assessing entanglement in Gaussian states mixing

TL;DR

This paper introduces a method to evaluate entanglement generation in Gaussian states mixed at a beam splitter, accounting for losses and noise, to optimize continuous variable entanglement schemes.

Contribution

It presents a fidelity-based pre-assessment technique for entanglement schemes involving Gaussian states, considering realistic noise and loss conditions.

Findings

Effective analysis of entanglement with noise and losses

Applicable to symmetric and asymmetric channels

Optimizes design of entanglement generation schemes

Abstract

We suggest and demonstrate a method to assess entanglement generation schemes based on mixing of Gaussian states at a beam splitter (BS). Our method is based on the fidelity criterion and represents a tool to analyze the effect of losses and noise before the BS in both symmetric and asymmetric channels with and without thermal effects. More generally, our scheme allows one to pre-assess entanglement resources and to optimize the design of BS-based schemes for the generation of continuous variable entanglement.